Filling anchor for teeth and process of applying same



anouz. FILLING ANCHOR FOR TEETH AND PROCESS OF APPLYING SAME.

APPLICATIQN FILED AUGJ Z, I921.

' Patented May 16, 1922 Fig. 6 3 i\- 2. 3 a Z GUSTAV HOLTZ, OF GOU'LDS'BORO, PENNSYLVANIA.

Application filed August 22, 1921.

To all whom it may concern:

Be it known that I, GUsrAv HoLrz, a citizen of the United States, residing at Gouldsboro, in the county of Vayne and State of Pennsylvania, have invented a new and useful Filling Anchor for Teeth and Processes of Applying Sam-e, of which the following is a specification.

This invention has reference to instrumentalities whereby fillings for cavities in human teeth may be anchored against the possibility of accidental displacement or loss, and its object is to provide means capable of being imbedded in the filling in bridging relation to the cavities and traversing the body of the tooth, so as to effectively unite two parts of a filling, lodged in opposite sides of the tooth in such manner that it will resist displacing forces.

The invention will be best understood from a consideration of the following detailed description, taken in connection with the accompanying drawing forming partof this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawing, but may be changed and modified, so long as such changes and modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawing- Fig. 1 is an elevation of one form of an chor Fig. 2 is an elevation of another, but generally similar form of anchor;

Fig. 3 is an exaggerated elevation of a tooth with a cavity therein ready for filling;

Fig. 4 is a view similar to Fig. 3, but showing the anchor in place, and the filling lodged in the cavity;

Fig. 5 is a section on the line 55 of F'g. 4;

Fig. 6 is a section on the line 66 of Fig. 1;

Fig. 7 is a section on the line 7-7 of Fig. 2.

Referring to the drawing, there is shown in Fig. 1 an anchor comprising an elongated bar 2, of substantially rectangular cross section and flattened and provided with heads 3 at opposite ends. These heads may be of rectangular shape in end view, as seen in Fig. 6, or of circular shape, as shown at 3" in Figs. 2 and 7.

In Fig. 3 there is indicated, more or less Specification of Letters Patent.

Patented May 16, 1922.

Serial No. 494,119.

diagrammatically and exaggerated, a molar tooth 4, having cavities 5 on opposite sides joined by an intermediate channel 6, which may be artificially formed, or may be formed by enlarging decayed structure or the like, occurring in the tooth. The cavities 5, are produced by drilling, or otherwise enlarging them on opposite sides of the tooth with the cleaned cavities considerably larger than and joined by a channel 6.

The tooth is prepared with the two spaced cavities 5 joined by the channel 6, with the drilled portions large enough to accommodate one of the double-ended anchors 1, which may be furnished in various sizes, as experience demonstrates, but the channel 6 should be properly proportioned, in the anchor chosen, to permit it to be covered by suitable material in the channel in addition to fillings 7 (see Figs. 4 and 5) lodged in the cavities 5, and surrounding the anchor 1 depressed below the crown of the tooth, so as not to be exposed in any way in the mouth to deleterious influences.

The invention is designed more particularly for use in filling-teeth with large cavities where a considerable portion of the process must be removed on each side of the tooth, and the filling must take the place of the body of the tooth. In such cases, the fillings frequently fall out of place, and it is only when a particularly sturdy and rigid anchor is provided, that such fillings can be depended upon, and crowns must take their place. With the large filling masses, there is liability of the natural crown of the tooth breaking down under the action of chewing, but with this invention, this liability is avoided by providing holding means, ex-

' tending through the tooth and serving after the manner of a rivet, .thus distributing the strains over so large an area that the undisturbed part of the tooth is amply reinforced to prevent collapse.

What is claimed is:

1. The process of filling extensive cavities in human teeth where the cavities reach through the body of the tooth, which consists in cleaning the cavity and enlarging it on opposite sides of the tooth and providing a connecting channel therebetween, and then lodging a double-headed anchor bar with the heads in the cavities and the intermediate part of the bar extending through the channel joining the cavities, and lodging filling in both the cavities and the connectmid tooth, and filling lodged in the cavity and in the part of tooth and enclosing the anchor.

In testimony that I claim the foregoing as my own, I have hereto affixed my si g na,- ture.

GUSTAV HOLTZ. 

